mtd: spi-nor: Remove recently added write_disable() call

Remove undocumented write_disable() call. This was added in commit
5d40b3d384dc ("mtd: spi-nor: Add parallel and stacked memories support")
without any explanation in the commit message. Remove it.

Fixes: 5d40b3d384dc ("mtd: spi-nor: Add parallel and stacked memories support")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 3114281..d22363e 100644
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -2073,10 +2073,6 @@
 		if (ret)
 			goto write_err;
 
-		ret = write_disable(nor);
-		if (ret)
-			goto write_err;
-
 		*retlen += written;
 		i += written;
 	}
@@ -2117,10 +2113,6 @@
 	if (ret)
 		return ret;
 
-	ret = write_disable(nor);
-	if (ret)
-		return ret;
-
 	ret = read_sr(nor);
 	if (!(ret > 0 && (ret & SR_QUAD_EN_MX))) {
 		dev_err(nor->dev, "Macronix Quad bit not set\n");
@@ -2182,7 +2174,7 @@
 		return -EINVAL;
 	}
 
-	return write_disable(nor);
+	return 0;
 }
 #endif